Friday

April 18, 2014

April 18, 2014

Number of results: 21,619

**statistics**

IQ scores were obtained from randomly selected couples.For 20 such pairs of people, the linear correlation coefficient is 0.881 and the equation of the regression line is y= -6.93+ 10.8x, where x represents the IQ score of the husband. Also, the 20x values have a mean of 105....
*Saturday, November 23, 2013 at 8:42am by angela*

**Statistics**

1. Correlation coefficient is number that indicated the degree of linear relationship between two variables. It can vary between -1 and +1. 2. I searched Google under the key words "'linear regression equation'" to get these possible sources: http://www.google.com/search?...
*Thursday, May 19, 2011 at 6:25pm by PsyDAG*

**statistics in psychology**

11. Make up a scatter diagram with 10 dots for each of the following situations: (a) perfect positive linear correlation, (b) large but not perfect positive linear correlation, (c) small positive linear correlation, (d) large but not perfect negative linear correlation, (e) no...
*Monday, July 25, 2011 at 10:25am by desiree*

**Statistics**

True or False and explain: If the slope of a regression line is large, the correlation between the variables will also be large. I was thinking false but am now second guesing myself. Thanks.
*Thursday, April 15, 2010 at 7:47pm by Anonymous*

**Statistics**

Suppose a study found a correlation coefficient r = -0.61 between the gender of a worker and their income. What can you conclude?
*Tuesday, January 4, 2011 at 7:03am by Lisa*

**math gre ques**

a correlation coefficient of absolute value close to one is a good fit. A correlation coefficient close to zero is a poor fit. 0.01 is a poor fit.
*Sunday, January 8, 2012 at 7:49pm by Damon*

**Statistics**

In conducting multiple regression analyses (MRAs), a major technical concern involves any high correlation of predictor (regressor) variables included in the model. The term for this is ....? A. Redundant predictors B. Close "knit" IVs C. Multicollinearity D. Correlative ...
*Sunday, September 2, 2012 at 9:03pm by Pat*

**statistics**

There are several variations of the correlation coefficient formula. Find the one that will use the data given in your problem, then calculate r.
*Tuesday, September 25, 2012 at 9:01am by MathGuru*

**Statistics**

Here are some numbers for checking your answer. approximately y=2.3x+23 The correlation coefficient is over 0.99.
*Saturday, May 25, 2013 at 3:58pm by MathMate*

**Statistic HELPPPPPP**

Here are a few hints to help you with some of your questions. Coefficient of Determination is the correlation coefficient squared. To find the correlation coefficient, take the square root of .755 (75.5% converted to a decimal) for your answer. The Coefficient of Determination...
*Monday, March 11, 2013 at 12:05am by MathGuru*

**statistics**

a sample of 50 women is obtained and their heights (in inches) and pulse rates (in beats per min) are measured. the linear correlation coefficient is 0.229 and the equation of the regression line y= 17.9 +0.870x where x represents hight. the mean of the 50 heights is 63.1 in ...
*Tuesday, October 22, 2013 at 8:13pm by robin*

**Statistics**

The linear correlation coefficient, r, is a numerical measure of the strength of the relationship between two variables representing quantitative data.
*Tuesday, May 17, 2011 at 3:54pm by EJ*

**statistics**

It goes from upper left to lower right, so what would the sign be? There is more variability as the correlation coefficient decreases, so away.
*Thursday, October 4, 2012 at 11:01am by PsyDAG*

**Statistics**

Using a sample of recent university graduates, you estimate a simple linear regression using initial annual salary as the dependent variable and the graduate's weighted average mark (WAM) as the explanatory variable. If the regression model has an estimated intercept of 2200 ...
*Friday, May 25, 2012 at 12:17am by Anthony*

**statistics**

3. The following data shows expenditures (in millions of dollars) and case (sales in millions) for seven major soft drink brands. Show a scatter diagram of the data and describe in words what it tells you. Calculate the correlation coefficient and see if it backs up the ...
*Wednesday, March 25, 2009 at 1:17pm by Karen*

**Psychology**

http://www.google.com/search?client=safari&rls=en&q=Calculating+correlation+coefficient&ie=UTF-8&oe=UTF-8 Although the sample is very small, it is likely to give a positive correlation. (f) If there is a correlation, it can be that A causes B, B causes A, or some unknown ...
*Monday, September 19, 2011 at 8:36pm by PsyDAG*

**Statistics**

For the regression equation, Y=bX+a, which of the following X,Y points will be on the regression line? a, a,b b, b,a c, 0,a d, 0,b
*Friday, October 26, 2012 at 3:54am by Robbie*

**statistics**

5. The ages of husbands and wives in a community were found to have a correlation coefficient equal to +0.8; the average of husbands’ ages was 25 years and that of wives’ ages 22 years; their standard deviations were respectively 4 and 5 years. Find the two lines of regression...
*Saturday, January 14, 2012 at 10:11pm by Deba*

**statistics**

5. The ages of husbands and wives in a community were found to have a correlation coefficient equal to +0.8; the average of husbands’ ages was 25 years and that of wives’ ages 22 years; their standard deviations were respectively 4 and 5 years. Find the two lines of regression...
*Saturday, February 11, 2012 at 9:47pm by Deba*

**correlation and regression**

No data is given.
*Tuesday, December 4, 2012 at 4:09pm by MathGuru*

**Statistics**

is this true or false? The linear correlation coefficient, r, is a numerical measure of the strength of the relationship between two variables representing quantitative data.
*Tuesday, May 17, 2011 at 3:54pm by jessica*

**Statistics**

True or false? The linear correlation coefficient, r, is a numerical measure of the strength of the relationship between two variables representing quantitative data.
*Thursday, May 19, 2011 at 4:49pm by Bill*

**statistics**

For problems 12 to 14, do the following: (a) Make a scatter diagram of the scores; (b) describe in words the general pattern of correlation, if any; (c) figure the correlation coefficient; (d) figure whether the correlation is statistically significant (use the .05 ...
*Saturday, January 8, 2011 at 4:11pm by kamelia *

**statistics**

For problems 12 to 14, do the following: (a) Make a scatter diagram of the scores; (b) describe in words the general pattern of correlation, if any; (c) figure the correlation coefficient; (d) figure whether the correlation is statistically significant (use the .05 ...
*Saturday, January 8, 2011 at 4:11pm by kamelia *

**Math**

You are given the following data. # of Absences Final Grade 0 96 1 92 2 71 3 66 4 60 5 51 A. Find the correlation coefficient for the data. B. Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.
*Friday, October 21, 2011 at 3:03pm by Jen*

**Stats**

You are given the following data. # of Absences Final Grade 0 96 1 92 2 71 3 66 4 60 5 51 A. Find the correlation coefficient for the data. B. Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.
*Sunday, October 23, 2011 at 1:04pm by Jennifer*

**math gre ques**

A sudent is analyzing data from an experiment using a linear model. when the student entered the data into his calculator and ran a least squares linear regression the calculator gave a correlation coefficient of 0.01. what can the student infer from this coefficient? a. the ...
*Sunday, January 8, 2012 at 7:49pm by luckybee*

**Statistics**

Determine the regression line of x+2y-5=0 and 3x+3y-8=0 (i) y on x and (ii) x on y, (iii) Find r using the regression coefficients
*Monday, September 26, 2011 at 8:43am by Deepti*

**Statistics**

Is is possible for the regression equation to have none of the actual (observed) data points located on the regression line?
*Sunday, December 2, 2012 at 11:32pm by Julia*

**PLZ HELP....STATS**

You are given the following data. # of Absences Final Grade 0 96 1 92 2 71 3 66 4 60 5 51 A. Find the correlation coefficient for the data. B. Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.
*Sunday, October 23, 2011 at 11:52pm by Jennifer*

**statistics**

calculate both the pearson and spearman correlation coefficient for the data below. state whether ther are significant? writ a brief statement to explain the results generated by each correlation. self-esteem 10.00, 9.00,8.00,7.00,7.00,6.00,6.00,6.00,4.0,4.00. grades 83.00,97....
*Sunday, April 24, 2011 at 7:03pm by ryee*

**Stat**

1. For the following scores, X Y 1 6 4 1 1 4 1 3 3 1 Sketch a scatter plot and estimate the value of the Pearson correlation. b. Compute the Pearson correlation 2. For the following set of scores, X Y 6 4 3 1 5 0 6 7 4 2 6 4 a. Compute the Pearson correlation. b. Add 2 points ...
*Monday, March 4, 2013 at 1:06am by Cole Brown*

**Math**

is coefficient of correlation and coefficient of determination the same thing? or different?
*Sunday, June 12, 2011 at 11:32pm by Thara*

**Math**

is coefficient of correlation and coefficient of determination the same thing? or different?
*Sunday, June 12, 2011 at 11:32pm by Thara*

**Statistics Help Please**

I'll narrow it down for you. It's either a) or d). If you need to do this by hand, find a correlation coefficient formula, plug in the values and go from there to find r.
*Sunday, March 29, 2009 at 4:47pm by MathGuru*

**stats**

I ran your data through an online calculator and the regression equation looks correct. See below: 7 data pairs (x,y): ( 4.00 , 19.0 ); ( 12.0 , 42.0 ); ( 9.00 , 28.0 ); ( 6.00 , 31.0 ); ( 10.0 , 39.0 ); ( 30.0 , 30.0 ); ( 7.00 , 21.0 ); y = a + bx where: a= 27.2 b= 0.252 ...
*Tuesday, March 5, 2013 at 9:00pm by MathGuru*

**math/stats**

If you square a correlation coefficient and subtract this number from 1.00, what is the result? Is it the coefficient of determination?
*Saturday, February 6, 2010 at 5:01pm by Patty*

**Statistics**

Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It ...
*Thursday, November 8, 2012 at 9:35am by John*

**statistics**

Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It ...
*Wednesday, November 14, 2012 at 1:02pm by joey*

**statistics**

Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It ...
*Thursday, November 15, 2012 at 10:26am by joey*

**Statistics**

Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It ...
*Friday, November 16, 2012 at 10:34am by John*

**Statistics**

Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It ...
*Sunday, November 18, 2012 at 10:23am by John*

**Statistics**

Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It ...
*Monday, December 17, 2012 at 11:14am by Jill*

**Statistics**

Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It ...
*Tuesday, December 18, 2012 at 10:56am by Jill*

**Stats**

Construct a scatterplot for the (x, y) values below, and answer the following questions. You do NOT need to submit your scatterplot with your answer; however, show all other work. x y 1 2.5 2 5.0 3 7.5 4 10.0 5 12.5 - What would be the slope of this regression line? - Would ...
*Sunday, October 7, 2012 at 9:58am by Anonymous*

**Statistics**

Yes, using http://easycalculation.com/statistics/correlation.php I get .8519
*Saturday, February 5, 2011 at 4:48pm by Damon*

**statistics**

For correlation, r^2 is a measure of effect size. It's the correlation coefficient squared and basically represents the proportion of variability that is shared by two variables. The r^2 value may show this effect to be strong or weak. As an example, suppose we have r^2 = .44...
*Friday, August 1, 2008 at 4:49pm by MathGuru*

**social psy**

) Researcher wants to look at the correlation between class attendance and grade in class (higher numbers indicating a higher grade). The researcher found the following result r = .82. The correlation coefficient tells researchers two pieces of information, the strength of the...
*Monday, October 3, 2011 at 2:23pm by deb*

**Statistics**

A set of X and Y scores has SSx=10, SSY=20, and SP=8, what is the slope for the regression equation? a. 8/10 b. 8/20 c. 10/8 d. 20/8 For the regression equation, Y=bX+a, which of the following X,Y points will be on the regression line? a. a,b b. b,a c. 0, a d. 0, b
*Monday, October 22, 2012 at 7:54pm by Robbie*

**Finance**

Security A has an expected return of 7%, a standard deviation of returns of 35%, a correlation coefficient with the market of -0.3, and a beta coefficient of -1.5. Security B has and expected return of 12%, a standard deviation of returns of 10%, a correlation with the market ...
*Monday, July 4, 2011 at 2:11am by Jamal*

**STATISTICS**

True or False? A researcher is interested in studying whether there is a correlation of IQ with health. For this purpose he selected a sample of 261 people and asked them to complete two questionnaires: one for IQ and one for health. After evaluating the questionnaires each ...
*Friday, September 6, 2013 at 6:15am by Marian*

**Econ/stats**

The following data represent the number of flash drives sold per day at a local computer shop and their prices. Price (x) Units Sold (y) $34 3 36 4 32 6 35 5 30 9 38 2 40 1 a. Develop a least-squares regression line and explain what the slope of the line indicates. b. Compute ...
*Sunday, April 29, 2012 at 11:29pm by Ruth*

**Econ/stats**

The following data represent the number of flash drives sold per day at a local computer shop and their prices. Price (x) Units Sold (y) $34 3 36 4 32 6 35 5 30 9 38 2 40 1 a. Develop a least-squares regression line and explain what the slope of the line indicates. b. Compute ...
*Sunday, April 29, 2012 at 11:32pm by Ruth*

**Stats**

The linear correlation coefficient is a numerical value that ranges from -1.00 to +1.00. Describe in a sentence or two the meaning of each of these correlation coefficients: a) -1.00 b) +1.00
*Thursday, October 20, 2011 at 11:57am by Jennifer*

**statistics**

These data were generated using the equation y = 2x + 1. A scatter diagram of the data results in five points that fall perfectly on a straight line. x 0 1 2 3 4 y 1 3 5 7 9 (a) Find the correlation coefficient.
*Sunday, May 26, 2013 at 1:53pm by DeeDee*

**STATISTICS**

Find a relatively large group of students, get their IQ and grade average, and do a correlation coefficient. To know the value of either variable, use a scatter diagram to find the other.
*Monday, February 10, 2014 at 5:29am by PsyDAG*

**Statistics**

Hi Can anyone tell me in a regression model are the values of 0.13 0.10 A good indication of of the total y explained in a regression model ?? Thanks.
*Thursday, June 4, 2009 at 4:31pm by Gary*

**Statistics**

The eggs of a species of bird have an average diameter of 23 mm and an SD of 0.45 mm. The weights of the chicks that hatch from these eggs have an average of 6 grams and an SD of 0.5 grams. The correlation between the two variables is 0.75 and the scatter diagram is roughly ...
*Friday, March 15, 2013 at 4:07pm by Kimberly *

**Statistics Help Please**

A sample of eight observations of variables x and y is shown below: x 5 3 7 9 2 4 6 8 y 20 23 15 11 27 21 17 14 Find the value of coefficient of correlation, r. a) - 0.991 b)0.872 c)- 0.512 d)0.942
*Sunday, March 29, 2009 at 4:47pm by Stuart*

**Stats**

Observations are taken on sales of a certain mountain bike in 30 sporting goods stores. The regression model was Y = total sales (thousands of dollars), X1 = display floor space (square meters), X2 = competitors’ advertising expenditures (thousands of dollars), X3 = advertised...
*Thursday, September 30, 2010 at 3:01pm by Mat*

**statistics**

How to (1)Comment on the R-squared. (2). Conduct the test of significance for the regression equation in part 1. Interpret your finding. (3). Interpret the correlation coefficient. (4). Test the significance of the strength of relationship. ( use á =.10) Data School-Enroll-Per...
*Friday, August 1, 2008 at 4:49pm by Azim*

**Research and Statistics**

In a study on caffeine and stress, college students indicated how many cups of coffee they drink per day and their current stress level on a scale of 1 to 10. The table shows the survey results. Using a web-calculator, obtain the appropriate correlation coefficients. Number ...
*Saturday, September 11, 2010 at 10:39am by Jenn*

**Math**

James Profit wants to take National Widget Company public. He is interested in the relationship between the size of the initial public offering and the price per share. A sample of 10 companies that recently went public revealed the following information: size($M)price per ...
*Monday, September 15, 2008 at 1:40am by Student*

**stats**

Can someone please help me, I have been working on this for 2 hours now and I keep getting a negative answer. You are given the following data. Number of Absences Final Grade 0 99 1 94 2 79 3 73 4 68 5 53 - Find the correlation coefficient for the data. - Find the equation for...
*Thursday, July 14, 2011 at 9:21pm by Celest*

**Correlations**

Which type of correlation would you expect to see between the distance traveled and the time it takes to travel that distance? A. positive correlation B. negative correlation C. no correlation idk why this question is confusing me, but it is
*Monday, November 11, 2013 at 11:20pm by hermes*

**algebra**

Which type of correlation would you expect to see between the distance traveled and the time it takes to travel that distance? A. positive correlation B. negative correlation C. no correlation idk why this question is confusing me, but it is
*Tuesday, November 12, 2013 at 12:25am by hermes*

**Math**

Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 minutes, 84.8 C after 9 minutes; 70.2º C after 18 minute; 54.4º C after 30 minutes; 42.5ºC after 37 minutes; and 24.9º C ...
*Wednesday, May 1, 2013 at 5:37pm by Brittany*

**algebra 1**

Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 minutes, 84.8 C after 9 minutes; 70.2º C after 18 minute; 54.4º C after 30 minutes; 42.5ºC after 37 minutes; and 24.9º C ...
*Wednesday, May 1, 2013 at 5:45pm by Brittany*

**statistics**

what is the most likely answer for the confidence coefficient of linear correlation if x = the number of hours spent studying for a test, and y = the number of points earned on the test?
*Friday, August 20, 2010 at 12:37am by marie*

**Stats**

Can someone please show me how to solve this step by step. I'm trying to understand the whole concept but I'm getting confused... Find the sample linear correlation coefficient between x and y: x: 5, 2, 2 y: 7, 4, 7 x^2: 25, 4, 4 y^2: 49, 16, 49 xy: 35, 18, 14 I know how to ...
*Saturday, June 29, 2013 at 2:12pm by y912f*

**Statistics**

Which, if any, of the values listed below for a correlation coefficient indicate a situation where more than half of the variation in one variable is associated with variation in the other variable? -.7 1 .3 .6 .9 I was thinking B
*Monday, November 12, 2012 at 9:41am by Mike*

**Business Statistics**

Instructions: Prepare your answers using Excel and show your work to get full or partial credit. Question 1: Using the file Wages.xlsx which contains information of working individuals, for a nationwide firm (Value 7 points). a) Run Descriptive Statistics for the variables ...
*Wednesday, December 14, 2011 at 4:12pm by Katie*

**Business Statistics**

If the total variation in y values is 200, and the variation explained by regression line is 180, then the coefficient of determination is equal to __________. A) 1.11 B) 0.90 C) 0.81 D) 1.21 I picked D 1.21
*Sunday, March 15, 2009 at 7:49pm by Stuart*

**Statistics**

It can be between 0 and +1, but considering the whole range, the correlation coefficient can vary between -1 and +1. Depending on how you consider the statement, it can be either true or false. Have you typed the statement exactly as written?
*Wednesday, November 7, 2012 at 9:20pm by PsyDAG*

**Statistic**

Number of Absences Final Grade 0 93 1 93 2 77 3 68 4 65 5 54 - Find the correlation coefficient for the data. I got this part of my answer. I believe the answer to be -0.9767 I am just going crazy with the second part. - Find the equation for the regression line for the data, ...
*Thursday, October 18, 2012 at 9:18pm by Ashley S*

**Statistics**

http://easycalculation.com/statistics/learn-regression.php
*Friday, May 20, 2011 at 8:47pm by TutorCat*

**Statistics**

http://easycalculation.com/statistics/learn-regression.php
*Friday, May 20, 2011 at 8:02pm by TutorCat*

**statistics**

The data below are the average one-way commute times (in minutes) of selected students during a summer literature class and the number of absences for those students for the term. Calculate the linear correlation coefficient.
*Saturday, April 6, 2013 at 5:16pm by Anonymous*

**Statistics**

In case you don't already know this, with a positive (+) correlation, both variables tend to increase/decrease together. With a negative (-) correlation, one variable increases, while the other decreases. I hope this helps a little more. Thanks for asking.
*Saturday, June 27, 2009 at 3:26pm by PsyDAG*

**Algebra**

2. Find the value of x^3 +2x^2 -3 when x =3 Answer-42 12. What type of correlation would you expect between the number of minutes a candle burns and the height of the candle? a. no correlation b. positive correlation c. negative correlation d. equal correlation Answer-c 13. ...
*Sunday, August 7, 2011 at 5:06pm by lizzie*

**STATS**

X 3, 5, 6, 8, 9, 10, 12, 14, 15 Y 30,33,34,36,37,40, 50, 60, 70 Calculate Linear Correlation Coefficient r Use significance level 0.05 and Appendix Table A-6 to make decision about linear correlation between x and y.
*Tuesday, March 30, 2010 at 12:28am by Mary*

**statistics**

http://easycalculation.com/statistics/learn-correlation.php
*Wednesday, December 21, 2011 at 2:34am by PsyDAG*

**statistics**

The answer should be a negative number as the numbers increase as x becomes smaller. The correlation coefficient lies between -0.2 and -0.3. Please post your equation for r again to see if it is interpreted correctly. Most of the time mistakes come from incorrect ...
*Sunday, June 23, 2013 at 12:06am by MathMate*

**statistics**

The scatter diagram of the lengths and widths of the petals of a type of flower is football shaped; the correlation is 0.8. The average petal length is 3.1 cm and the SD is 0.25 cm. The average petal width is 1.8 cm and the SD is 0.2 cm. (a)One of the petals is 0.2 cm wider ...
*Thursday, March 28, 2013 at 7:59pm by pat*

**statistics**

True or False: A zero population correlation coefficient between a pair of random variable means that there is no linear relationship between the random variable.
*Monday, February 8, 2010 at 8:07pm by iyra*

**algebra 1**

*I have asked countless people to help me with this story problem and nobody seems to know how to do it! Please help! Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3 minutes; 90º C after 5 ...
*Thursday, May 2, 2013 at 1:16am by Brittany*

**Math**

dunno about your calculator, but at http://www.alcula.com/calculators/statistics/linear-regression/ we get y = 11.33x - 0.90
*Thursday, January 23, 2014 at 9:03am by Steve*

**Statistics**

Eggs(x): mean = 23, sd = 0.45 Weights of chicks(y): mean = 6, sd = 0.5 Correlation: r = 0.75 Regression equation is in this format: predicted y = a + bx ...where a = intercept and b = slope. To find the equation, you need to substitute the information given in the problem into...
*Friday, March 15, 2013 at 4:07pm by MathGuru*

**statistics**

1.0 When data fit exactly onto a straight line, the correlation coefficient is either +1 or -1. If the slope of the line is positive, r=+1. If the slope of the line is negative, r=-1. In this case, the slope=+2, so r=+1.0
*Sunday, May 26, 2013 at 1:53pm by MathMate*

**Math**

maybe it'd be easier without all the zeros: 1 18 2 37 3 48 4 66 y=17x comes close. The errors are 1 +1 2 +3 3 +1 4 -2 Use your favorite regression tool for a more exact line. The best-fit line is y = 15.5x + 3.5 a good calculator and grapher is at http://www.alcula.com/...
*Thursday, January 16, 2014 at 6:06pm by Steve*

**statistics**

Please Help! My book and instructor are no help. Please help me understand why I need to make a scatter diagram, when dealing with bivariate data, and how to find SS(x), SS(y), SS(xy), and r. I have all the formulas, but don't understand. Thanks! I dont know that the diagram ...
*Tuesday, August 30, 2005 at 9:45pm by Rebecca*

**statistics**

What would you guess the value of the correlation coefficient to be for the pair of variables: "number of man-hours worked" and "number of units of work completed"? a) approximately 0.9 b) approximately 0.4 c) approximately 0.0 d) approximately -0.4 e) approximately -0.9
*Tuesday, August 2, 2011 at 2:59pm by Anonymous*

**Statistics**

Pre-exam: mean = 275, sd = 26 Final exam: mean = 71, sd = 6 Correlation: r = 0.67 Regression equation is in this format: predicted y = a + bx ...where a = intercept and b = slope. To find the equation, you need to substitute the information given in the problem into a ...
*Sunday, February 1, 2009 at 2:45pm by MathGuru*

**math**

interpret an r value of -0.82. a)strong negative correlation B)weak negative correlation C)strong positive correlation D)no correlation
*Friday, November 13, 2009 at 12:01pm by princess*

**Statistics!**

It would depend on the type of data. If not normally distributed, the median would be good. If seeking to show relationship between two variables, a correlation coefficient would be helpful. With several variables, you might use an ANOVA.
*Wednesday, March 14, 2012 at 12:40pm by PsyDAG*

**statistics**

1. In an ANOVA, one group has a much larger sample mean than the other. The analyst decides to remove this group and to conduct the analysis on the remaining groups only. Which of the following statements is correct? Select one: a. This analysis is not correct, as now the ...
*Monday, October 14, 2013 at 7:36am by Jumbo*

**Statistics**

Calculate a linear regression, the residuals, and the correlation between two variables using the following info: number of people:12,14,15,18,20,16,14,13,18,19,20,22 and cost of drinks:24,30,36,38,65,44,36,30,39,76,80,85
*Thursday, May 30, 2013 at 8:12pm by Kathryn*

**Psychology Statistics**

2 For a sample of n = 20 individuals, how large a Pearson correlation is necessary to be statistically significant for a two-tailed test with = .05? 3 The Pearson correlation is calculated for a sample of n = 25 individuals. What value of df should be used to ...
*Friday, April 26, 2013 at 8:19am by Chioma*

**Economics**

Please correct if I have stated the right correlation to the following relationships: a) volume of auto traffic and auto accident rate -> 0 correlation b) pesticide and crop yield -> negative correlation c) consumption and GDP -> positive correlation
*Tuesday, January 25, 2011 at 9:45pm by Anonymous*

**Statistics**

Using the following information find a 95% confidence interval for the intercept in the regression of measured distance on recession velocity. VARIABLE COEFFICIENT STANDARD ERROR Constant 0.3391 0.1185 Velocity 0.001373 0.000227 T-STAT P-VALUE 3.369 0.0028 6.036 0.0000045 Est...
*Wednesday, March 14, 2007 at 8:18pm by MMK*

Pages: <<Prev | 1 | **2** | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>